Rebuilt Straight Six Engine Prep and Install

I am "Green" when it comes to working on automobiles. I recently purchased a non-running 1950 Plymouth Special Deluxe. I just bought a rebuilt straight 6 engine and plan on dropping in soon. As I mentioned earlier- I am extremely green when it comes to automotive work, but am hoping to do as much as I can with a friend.
I am hoping to get a good checklist of what to do before firing "new" engine in the Plymouth. No detail or spec. Too small obviously. I appreciate any input. I will also keep you updated. Thank you for your time.